What happens in Vegas, really does stay in Vegas... when it comes to a drunken groom-to-be. Greg Russell previews "Hangover" in tonight's Screen Scene.

From "Old School" director Todd Phillips comes a new comedy called The Hangover Its about a bachelor party gone very, very wrong. Four buddies get together to celebrate, unfortunately, the day after the party they discover that the groom is missing and they can't recall anything from the night before. But the more they begin to uncover, the more they realize just how much trouble they're really in.

Greg: The most hilarious part is .. you guys don't remember what the heck happened. It's just you wake up the next day and it's like what the devil went on.

Ed Helms: Yeah, that's sort of the driving force of the movie I guess. It's like we we went a little too far … we don't know how…and why exactly. We've got to figure it out. Have you seen the movie?

Zach Galifianakis: I've heard about it

Greg: You've heard about it.

Zach: Yeah.

Greg: It's really good… it's really good…

Zach: I'm hearing that.

Mike Tyson also appears in this movie with a very memorable singing performance. The Hangover is rated R and opens Friday.

For Screen Scene… I'm Greg Russell.